Fig. 4
Proportion of mutual cooperation achieved in the culminating user study. In this study, 66 volunteer participants were paired with each other and S# in three representative games (Chicken, Alternator Game, and Prisoner’s Dilemma). Results are shown for when cheap talk was both permitted and not permitted. Note that S# is identical to S++ when cheap talk is not permitted. a The proportion of rounds in which both players cooperated over all rounds and all games. b The proportion of time in which both players cooperated over all games. Bars and lines show average values over all trials, while error bars and ribbons show the standard error of the mean. A full statistical analysis confirming the observations shown in this figure are provided in Supplementary Note 7
